Liu Heng, Xie Mingsi, Liu Yaohong, Jia Gaojun, Liao Ruijuan, Zhang Ao, Fang Yi, Song Xiaoli, Zhang Chunxiu, Yu Haifeng
School of Printing and Packaging Engineering, Beijing Institute of Graphic Communication, Beijing 102600, China.
Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, School of Materials Science and Engineering, Peking University, Beijing 100871, China.
Molecules. 2025 Aug 21;30(16):3441. doi: 10.3390/molecules30163441.
A series of novel discotic liquid crystalline donor-acceptor hybrid heterojunctions were prepared by blending the triphenylene derivative (T5E36) as donor and perylene tetracarboxylic esters as acceptor. Mesophases of blends were characterized by using polarized optical microscopy, differential scanning calorimetry, and X-ray diffraction. Results suggest that all the blends formed liquid crystalline phases, where both compounds in the blends self-assembled separately into columns yet cooperatively contributed to the overall hexagonal or tetragonal columnar mesophase structure. The charge carrier mobilities were characterized using a time-of-flight technique. The phase-separated columnar nanostructures of the donor and acceptor components play an important role in the formation of molecular heterojunctions exhibiting highly efficient ambipolar charge transport, with mobilities on the order of 10 cm V s. These blends with ambipolar transport properties have great potential for application in non-fullerene organic solar cells, particularly in bulk heterojunction architectures.
通过将作为供体的三亚苯基衍生物（T5E36）与作为受体的苝四羧酸酯混合，制备了一系列新型盘状液晶供体-受体混合异质结。采用偏光显微镜、差示扫描量热法和X射线衍射对共混物的中间相进行了表征。结果表明，所有共混物均形成液晶相，共混物中的两种化合物分别自组装成柱状，但协同作用形成了整体的六方或四方柱状中间相结构。使用飞行时间技术对载流子迁移率进行了表征。供体和受体组分的相分离柱状纳米结构在形成具有高效双极性电荷传输的分子异质结中起着重要作用，迁移率约为10 cm V s。这些具有双极性传输特性的共混物在非富勒烯有机太阳能电池中，特别是在本体异质结结构中具有巨大的应用潜力。
